struts2 iterator标签内使用下拉框
先分别介绍一下select标签和struts2的iterator标签
struts2的iterator标签主要用来对集合的迭代输出，有一下三个属性：
value：被迭代的集合，可选
id ：指定集合里面的元素的id
status 迭代元素的索引，该属性制定了迭代是的IteratorStatus实例，通过该实例可以判断当前迭代元素的属性值，默认值为false。
IteratorStatus实例包括一下几个方法：
int getCount() 返回当前迭代了几个元素
int getIndex() 返回当前元素索引
boolean isEven() 当然的索引是否偶数
boolean isFirst() 当前是否第一个元素
boolean isLast() 当前是否最后一个元素
boolean isOdd() 当前元素索引是否奇数
select标签有一下几个可选属性：
disableddisabled规定禁用该下拉列表。
multiplemultiple规定可选择多个选项。
namename 规定下拉列表的名称。
sizenumber 规定下拉列表中可见选项的数目。
示例：
<select>
<option value ="volvo">Volvo</option>
<option value ="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
在iterator里使用select，jsp代码：
<form action="AnswerCAction"> <table width="80%" border="0" align="center" cellpadding="3" cellspacing="1" status="i"> <tr> <td width="90%" type="submit" value="下一页"/> </form>
package action;import hibernate.bean.Choice;import hibernate.dao.AnswerCDao;import java.util.List;public class AnswerCAction extends SuperAction{private Choice choice;private List testclist;private List choicelist;private Long stuansId;private Long testChoId;private Long choiceId;private AnswerCDao accDao;private int i;private String[] setAnswer = new String[30];private String answer0;private String answer1;private String answer2;private String answer3;private String answer4;private String answer5;private String answer6;private String answer7;private String answer8;private String answer9;private String answer10;private String answer11;private String answer12;private String answer13;private String answer14;private String answer15;private String answer16;private String answer17;private String answer18;private String answer19;private String answer20;private String answer21;private String answer22;private String answer23;private String answer24;private String answer25;private String answer26;private String answer27;private String answer28;private String answer29;private String answer30;public Choice getChoice() {return choice;}public void setChoice(Choice choice) {this.choice = choice;}public String getAnswer0() {return answer0;}public void setAnswer0(String answer0) {this.answer0 = answer0;}public String getAnswer1() {return answer1;}public void setAnswer1(String answer1) {this.answer1 = answer1;}public String getAnswer2() {return answer2;}public void setAnswer2(String answer2) {this.answer2 = answer2;}public String getAnswer3() {return answer3;}public void setAnswer3(String answer3) {this.answer3 = answer3;}public String getAnswer4() {return answer4;}public void setAnswer4(String answer4) {this.answer4 = answer4;}public String getAnswer5() {return answer5;}public void setAnswer5(String answer5) {this.answer5 = answer5;}public String getAnswer6() {return answer6;}public void setAnswer6(String answer6) {this.answer6 = answer6;}public String getAnswer7() {return answer7;}public void setAnswer7(String answer7) {this.answer7 = answer7;}public String getAnswer8() {return answer8;}public void setAnswer8(String answer8) {this.answer8 = answer8;}public String getAnswer9() {return answer9;}public void setAnswer9(String answer9) {this.answer9 = answer9;}public String getAnswer10() {return answer10;}public void setAnswer10(String answer10) {this.answer10 = answer10;}public String getAnswer11() {return answer11;}public void setAnswer11(String answer11) {this.answer11 = answer11;}public String getAnswer12() {return answer12;}public void setAnswer12(String answer12) {this.answer12 = answer12;}public String getAnswer13() {return answer13;}public void setAnswer13(String answer13) {this.answer13 = answer13;}public String getAnswer14() {return answer14;}public void setAnswer14(String answer14) {this.answer14 = answer14;}public String getAnswer15() {return answer15;}public void setAnswer15(String answer15) {this.answer15 = answer15;}public String getAnswer16() {return answer16;}public void setAnswer16(String answer16) {this.answer16 = answer16;}public String getAnswer17() {return answer17;}public void setAnswer17(String answer17) {this.answer17 = answer17;}public String getAnswer18() {return answer18;}public void setAnswer18(String answer18) {this.answer18 = answer18;}public String getAnswer19() {return answer19;}public void setAnswer19(String answer19) {this.answer19 = answer19;}public String getAnswer20() {return answer20;}public void setAnswer20(String answer20) {this.answer20 = answer20;}public String getAnswer21() {return answer21;}public void setAnswer21(String answer21) {this.answer21 = answer21;}public String getAnswer22() {return answer22;}public void setAnswer22(String answer22) {this.answer22 = answer22;}public String getAnswer23() {return answer23;}public void setAnswer23(String answer23) {this.answer23 = answer23;}public String getAnswer24() {return answer24;}public void setAnswer24(String answer24) {this.answer24 = answer24;}public String getAnswer25() {return answer25;}public void setAnswer25(String answer25) {this.answer25 = answer25;}public String getAnswer26() {return answer26;}public void setAnswer26(String answer26) {this.answer26 = answer26;}public String getAnswer27() {return answer27;}public void setAnswer27(String answer27) {this.answer27 = answer27;}public String getAnswer28() {return answer28;}public void setAnswer28(String answer28) {this.answer28 = answer28;}public String getAnswer29() {return answer29;}public void setAnswer29(String answer29) {this.answer29 = answer29;}public String getAnswer30() {return answer30;}public void setAnswer30(String answer30) {this.answer30 = answer30;}public AnswerCDao getAccDao() {return accDao;}public void setAccDao(AnswerCDao accDao) {this.accDao = accDao;}public String execute()throws Exception{//String a0 = getAnswer0();String[] getAnswer = {this.getAnswer0(),this.getAnswer1(),this.getAnswer2(),this.getAnswer3(),this.getAnswer4(),this.getAnswer5(),this.getAnswer6(),this.getAnswer7(),this.getAnswer8(),this.getAnswer9(),this.getAnswer10(),this.getAnswer11(),this.getAnswer12(),this.getAnswer13(),this.getAnswer14(),this.getAnswer15(),this.getAnswer16(),this.getAnswer17(),this.getAnswer18(),this.getAnswer19(),this.getAnswer20(),this.getAnswer21(),this.getAnswer22(),this.getAnswer23(),this.getAnswer24(),this.getAnswer25(),this.getAnswer26(),this.getAnswer27(),this.getAnswer28(),this.getAnswer29(),this.getAnswer30()}; testclist = (List) session.get("testclist");stuansId = (Long) session.get("stuansid");choicelist = (List) session.get("choicelist");int size = choicelist.size();if(size!=0){for(i=0;i<size;i++){//choiceId = (Long) choicelist.get(i);testChoId = (Long) testclist.get(i);accDao.insert2ac(testChoId,stuansId,getAnswer[i]);}return "success";}else{return "error";}}}